A video has been leaked online of prostitutes in an unknown location in China receiving a lecture on how to increase their customer base, and even more importantly, how to find high-calibre customers.

No talking at the back.

Like many classes, it involved a stern teacher and a couple of students giggling and whispering at the back. This particular lecture included a screen that may have been a PPT and focused on how to use social media services such as Momo, WeChat and Sina Weibo.

The bespectacled lecturer also emphasized the importance of using a photoshopped picture to attract customers’ interest, stressing the value of having an ovular face and attractive eyes.

The points on the whiteboard also included a reminder that students should maintain contact with their higher-level customers and avoid wasting time on “diaosi,” an internet slang word for loser.

Attentive students.

The video has been forwarded well over 1,000 times on Sina Weibo and watched over 1 million times. One Sina Weibo user said: “Life is all about selling. We all need to learn to sell ourselves.” Another said “The corporate training industry really is frighteningly competitive nowadays.” Another said: “Does this mean the women I’ve been chatting with on Momo are all hookers?”